Long-Lasting Poloidal ULF Waves Observed by Multiple Satellites and High-Latitude SuperDARN Radars

Shi, X.; Baker, J. B. H.; Ruohoniemi, J. M.; Hartinger, M. D.; Murphy, K. R.; Rodriguez, J. V.; Nishimura, Y.; McWilliams, K. A.; Angelopoulos, V.

doi:10.1029/2018JA026003

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Long-Lasting Poloidal ULF Waves Observed by Multiple Satellites and High-Latitude SuperDARN Radars

2018
By Shi, X. ; Baker, J. B. H. ; Ruohoniemi, J. M. ; ...
Source: Journal of Geophysical Research: Space Physics 123(10), 8422-8438, 2018

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Journal Title:

Journal of Geophysical Research: Space Physics
Personal Author:

Shi, X. ; Baker, J. B. H. ; Ruohoniemi, J. M. ; Hartinger, M. D. ; Murphy, K. R. ; ... More +

Shi, X. ; Baker, J. B. H. ; Ruohoniemi, J. M. ; Hartinger, M. D. ; Murphy, K. R. ; Rodriguez, J. V. ; Nishimura, Y. ; McWilliams, K. A. ; Angelopoulos, V. Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

Poloidal ultralow frequency (ULF) waves between 5 and 10 mHz were observed by multiple satellites and three high-latitude Super Dual Auroral Radar Network radars during the recovery phase of a moderate geomagnetic storm on 24-27 January 2016. The long-lasting ULF waves were observed in the magnetic field and energetic particle flux perturbations during three successive passes by two Geostationary Operational Environmental Satellites through the dayside magnetosphere, during which plasmasphere expansion and refilling were observed by two Time History of Events and Macroscale Interactions during Substorms probes. The radial magnetic field oscillation was in phase (similar to 180 degrees out of phase) with the northward (southward) moving proton flux oscillation at 95 keV, consistent with high-energy drift-bounce resonance signatures of protons with second harmonic poloidal standing Alfven waves. The longitudinal extent of the waves approached 10hr in local time on the dayside and gradually decreased with time. High-time-resolution (similar to 6s) data from three high-latitude Super Dual Auroral Radar Network radars show that the wave intensification region was localized in latitude with a radial extent of similar to 135-225 km in the subauroral ionosphere. No signature of these waves were observed by ground-based magnetometers colocated with the Geostationary Operational Environmental Satellites suggesting that the poloidal waves were high-m mode and thus screened by the ionosphere. During this interval one of the Time History of Events and Macroscale Interactions during Substorms probes observed a bump-on-tail ion distribution at 1-3 keV, which we suggest is the source of the long-lasting second harmonic poloidal ULF waves.
Keywords:

[+]

Astrophysics Geomagnetism Remote Sensing Satellites
Source:

Journal of Geophysical Research: Space Physics 123(10), 8422-8438, 2018
DOI:

https://doi.org/10.1029/2018JA026003
Pubmed Central ID:

PMC6258085
Document Type:

Journal Article
Funding:

Grant no. NA17OAR4320101
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Other
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PMC
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urn:sha256:e6be1a076a961a55f6b43ceb7756fbe3c8b0c4687a7a18e8e1fdad4301b343af
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https://repository.library.noaa.gov/view/noaa/25335/noaa_25335_DS1.pdf
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Long-Lasting Poloidal ULF Waves Observed by Multiple Satellites and High-Latitude SuperDARN Radars

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